Will our Philosophy to later Life Seem but a crudeness of the planet's youth, Our Wisdom but a parasite of Truth?
Evolution... is the most powerful and the most comprehensive idea that has ever arisen on Earth.
The scientific doctrine of progress is destined to replace not only the myth of progress, but all other myths of human earthly destiny. It will inevitably become one of the cornerstones of man's theology, or whatever may be the future substitute for theology, and the most important external support for human ethics.
By death the moon was gathered in Long ago, ah long ago; Yet still the silver corpse must spin And with another's light must glow. Her frozen mountains must forget Their primal hot volcanic breath, Doomed to revolve for ages yet, Void amphitheatres of death. And all about the cosmic sky, The black that lies beyond our blue, Dead stars innumerable lie, And stars of red and angry hue Not dead but doomed to die.
Amoeba has her picture in the book, Proud Protozoon!-Yet beware of pride, All she can do is fatten and divide; She cannot even read, or sew, or cook... The Worm can crawl But has no eyes to look. The Jelly-fish can swim But lacks a bride.
To speculate without facts is to attempt to enter a house of which one has not the key, by wandering aimlessly round and round, searching the walls and now and then peeping through the windows. Facts are the key.
The proof given by Wright, that non-adaptive differentiation will occur in small populations owing to "drift," or the chance fixation of some new mutation or recombination, is one of the most important results of mathematical analysis applied to the facts of neo-mendelism. It gives accident as well as adaptation a place in evolution, and at one stroke explains many facts which puzzled earlier selectionists, notably the much greater degree of divergence shown by island than mainland forms, by forms in isolated lakes than in continuous river-systems.
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